Micrhystridium |
Micrhystridium raspum
|
Nd |
Nd |
|
Micrhystridium |
Micrhystridium rectangulare
|
Nd |
Nd |
|
Micrhystridium |
Micrhystridium recurvatum
|
Nd |
Nd |
|
Micrhystridium |
Micrhystridium recurvatum
|
Nd |
Nd |
|
Micrhystridium |
Micrhystridium recurvatum
|
France |
Middle Jurassic |
|
Micrhystridium |
Micrhystridium recurvatum
|
France |
Middle Jurassic |
|
Micrhystridium |
Micrhystridium recurvatum
|
France |
Middle Jurassic |
|
Micrhystridium |
Micrhystridium recurvatum
|
France |
Middle Jurassic |
|
Micrhystridium |
Micrhystridium reductum
|
France |
Middle Jurassic |
|
Micrhystridium |
Micrhystridium regulare
|
China |
Early Cambrian |
|
Micrhystridium |
Micrhystridium resistens
|
USSR |
Middle Cambrian |
|
Micrhystridium |
Micrhystridium reticulatum
|
Nd |
Nd |
|
Micrhystridium |
Micrhystridium rhachos
|
England |
Middle Jurassic |
|
Micrhystridium |
Micrhystridium rhopalicum
|
England |
Late Jurassic |
|
Micrhystridium |
Micrhystridium rigidum
|
Nd |
Nd |
|
Micrhystridium |
Micrhystridium rigidum
|
England |
Late Cretaceous |
|
Micrhystridium |
Micrhystridium rigidum
|
Nd |
Nd |
|